Striatobalanus tenuis (Hoek, 1883)

Pitriana, Pipit, Jones, Diana S., Corbari, Laure & Rintelen, Kristina von, 2020, New insights gained from museum collections: Deep-sea barnacles (Crustacea, Cirripedia, Thoracica) in the Museum National d'Histoire Naturelle, Paris, collected during the Karubar expedition in 1991, Zoosystematics and Evolution 96 (2), pp. 649-698 : 649

Striatobalanus tenuis (Hoek, 1883) Figure 38

Balanus tenuis Hoek, 1883: 154, pl. 13, figs 29-33. - 1913: 190, pl. 17, figs 14-19, pl. 18, fig. 1. - Gruvel 1905: 247, fig. 275. - Pilsbry 1916: 216. - Barnard 1924: 74. - Nilsson-Cantell 1925: 34, fig. 13, pl. 1, figs 5, 6. - 1927: 785. - 1938: 46. - Broch 1931: 70. - Hiro 1937b: 439, fig. 24. - Utinomi 1962: 216. - 1968: 174. - 1969: 88, fig. 6. - Utinomi and Kikuchi 1966: 6.

Balanus albus Hoek, 1913: 185, pl. 16, figs 12, 13, pl. 17, figs 1-6. - Stubbings 1936: 41, fig. 18.

Chirona (Striatobalanus) tenuis . - Newman & Ross, 1976: 50. - Rosell 1989: 33, pl. 10g. - 1991: 38.

Balanus (Chirona) tenuis . - Ren & Liu, 1978: 161, fig. 22, pl. 7, figs 6-10. - Nilsson-Cantell 1921: 302.

Balanus tenuis . - Dong et al.. 1982: 97, fig. A-C.

Chirona tenuis . - Zevina et al.. 1992: 74, fig. 50.

Striatobalanus tenuis . - Jones. 2004: 152. - Liu and Ren 2007: 363, fig. 161. - Chan 2009: 74, fig. 2H and fig. 23A-G.

Material examined.

- Kei Islands: 5 specimens, MNHN-IU-2019-4820, Stn. CC 10, 05°21'S, 132°30'E, 329-389 m depth, 23 October 1991; 1 specimen (shell only), MNHN-IU-2019-4835, Stn. CP 16, 05°17'S, 132°50'E, 330-350 m depth, 24 October 1991.

- Tanimbar Island: 1 specimen, MNHN-IU-2019-4832, Stn. DW 49, 08°00'S, 132°59'E, 206-2010 m depth, 29 October 1991; 1 specimen (shell only), MNHN-IU-2019-4833, Stn. CP 65, 09°14'S, 132°27'E, 174-176 m depth, 1 November 1991; 4 specimens (shell only), MNHN-IU-2019-4834, Stn. CP 79, 09°16'S, 131°22'E, 239-250 m, 3 November 1991; 1 specimen (only shell), MNHN-IU-2019-4813, Stn. CP 85, 09°22'S, 131°14'E, 240-245 m, 4 November 1991, attached to shell of gastropod; 2 specimens, MNHN-IU-2019-4819, Stn. CP 86, 09°26'S, 131°13'E, 223-225 m depth, 4 November 1991, attached to gastropod shells.

Diagnosis.

Shell colour whitish to yellowish; surface smooth, glossy; orifice pentagonal shaped, deeply toothed; radii narrow, summits very oblique, slightly concave; basis solid; scutum with longitudinal striations; tergum with short, rather broad spur.

Description.

Shell with six plates, conical; orifice large, distinctly toothed; radii well-developed; basis thin, ribbed, solid. Scutum triangular, not elongated, with longitudinal striations; tergum slightly beaked, exhibiting traces of longitudinal striations, spur short, slightly narrow, depressor crests distinctly developed. Cirri I to VI with rami slightly equal in length, transparent and orange-coloured. Penis rather long, sparse, minute hairs on the surface, tapering towards tip, distinctly hairy at tip. Maxillule with edge slightly straight, all the setae similar sized. Mandibles with five teeth, fourth and fifth small. Measurements of five specimens basal length of shell 18.92-28.30 mm, orifice length 13.78-16.29 mm, carinal height 18.02-20.24 mm, orifice width 10.15-13.70 mm, basal width 20.51-28.03 mm.

Distribution.

Arafura Sea, Indonesia; Indo-west Pacific: S Africa; Persian Gulf; Indian Ocean; Australia (N); Singapore; Malay Arch.; Vietnam; Hong Kong; S China Sea; E China Sea; Philippines; Taiwan; Japan (S); W Pacific; attached to crabs, gastropod, bivalve, shells solitary coral, bark of coconut, gorgonians, antipatharians, stones; 7-551 m depth ( Jones and Hosie 2016). In this study, Striatobalanus tenuis was found at Kei Islands and Tanimbar Island, Indonesia.

Type locality.

West of Mindoro, Philippines; 6°8'N, 121°19'E; depth: 275 m, at coral-bottom ( Hoek 1913).

Figures

Figure 38. Striatobalanus tenuis (Hoek, 1883) (MNHN-IU- 2019 - 4820). a. orifice view; b. left lateral view; c. right lateral view; d. basal view. Scale bar: 10 mm (a-d).